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One to two-year old vines with suitable grafted rootstocks are recommended as
relatively risk-free. Roots can reportedly be cut back to around 8-10 inches
length if absolutely necessary although this action does seem to retard growth,
during the first season, in some varieties planted in cool climate regions. Dig
a hole about 10 inches deep and plant the vine, spreading roots apart on a small
pile of soil so that the graft union will be 4 to 6 inches above ground level
when the hole is back-filled. The scion is best restricted to 2 buds (when any
danger of frost attack has passed). Point the 2-budded scion spur towards the
support-stake or wire so the new shoots will grow as close to the support system
as possible and will be easier to tie without bending and breaking. Backfill the
planting hole and pack soil firmly as you go (not compressing the soil too much).
Soil may have to be added later if it subsides too much after heavy rain.
In drought-prone areas it is best to cover the entire new plant with soil, or other
type of covering, for several weeks to prevent drying-out. Once growth has taken
hold the soil is pulled away from the plant so that the graft-joint and buds/shoots
are again correctly exposed above ground level.
If using own-rooted vines, all buds should be trimmed off except for the
upper two (to prevent unwanted shoots coming up from the root zone). Plant
as previously, making sure the two surviving buds are well above ground
surface. Cover completely with a mound of dirt, removed later when the shoots
push out of the mound and are well along. Make sure a hard crust does not
form on the dirt mound that would stop new shoots from emerging.
Unpruned plant growth is usually allowed for the first two years in order to
avoid stress with berries expected to make their appearance, in the 3rd year,
after first use of the preferred style of winter vine-pruning.
Grapevines are sensitive to too much moisture so occasional testing with a
soil moisture meter (available at most local nurseries) is a good investment.
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